Groundwater components in the alluvial aquifer of the alpine Rhone River valley, Bois de Finges area, Wallis Canton, Switzerland |
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| Authors: | Marc Schürch François-D Vuataz |
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| Institution: | (1) Centre of Hydrogeology, University of Neuchatel, 11, rue E. Argand, 2007 Neuchatel, Switzerland, |
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| Abstract: | Source, type, and quantity of various components of groundwater, as well as their spatial and temporal variations were determined
by different hydrochemical methods in the alluvial aquifer of the upper Rhone River valley, Bois de Finges, Wallis Canton,
Switzerland. The methods used are hydrochemical modeling, stable-isotope analysis, and chemical analysis of surface water
and groundwater. Sampling during high- and low-water periods determined the spatial distribution of the water chemistry, whereas
monthly sampling over three years provided a basis for understanding seasonal variability. The physico-chemical parameters
of the groundwater have spatial and seasonal variations. The groundwater chemical composition of the Rhone alluvial aquifer
indicates a mixing of weakly mineralized Rhone River water and SO4-rich water entering from the south side of the valley. Temporal changes in groundwater chemistry and in groundwater levels
reflect the seasonal variations of the different contributors to groundwater recharge. The Rhone River recharges the alluvial
aquifer only during the summer high-water period.
Electronic Publication |
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| Keywords: | hydrochemistry unconsolidated sediments groundwater/surface-water relations hydrochemical modeling Switzerland |
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